E06
Crystal Quest
Control board memory / RTC fault
Display shows E06 and time-of-day or regeneration schedule will not hold; clock resets after power loss.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed backup capacitor or battery on Crystal Quest main PCB, Corrupted firmware, Damaged control board from power surge, Loose low-voltage power connector
How to Fix / Troubleshooting
Safety first: Unplug the unit before removing the control panel cover.
- Check power supply: Verify the Crystal Quest AC adapter is the correct voltage and firmly plugged into both the outlet and the control valve. Replace if warm, buzzing, or visibly damaged.
- Inspect board connections: Remove the front panel and ensure all ribbon cables and connectors are fully seated on the main PCB.
- Factory reset: Perform a control reset per the Crystal Quest manual (typically holding specific buttons while powering on). Reprogram hardness, time, and regeneration settings.
- Observe behavior: If the clock still resets after brief power interruptions, the onboard memory/RTC circuit has failed. Replace the Crystal Quest main control board.
- Surge protection: Install a surge protector on the outlet to prevent future board damage.
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Repair Difficulty
Medium
3/5
Required Part
Crystal Quest main control board
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